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Finding the Fourth Proportional to 1,870.08, 2,804.76 and 638.16

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Solution

The fourth proportional to 1,870.08, 2,804.76 and 638.16 is: 957.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,870.08 : 2,804.76 = 638.16 : x
  2. Step 2: Convert to fraction form
    1,870.08/2,804.76 = 638.16/x
  3. Step 3: Cross multiply
    1,870.08x = 2,804.76 × 638.16
  4. Step 4: Simplify right side
    1,870.08x = 1,789,885.64
  5. Step 5: Solve for x
    x = 1,789,885.64/1,870.08
  6. Step 6: Final answer
    x = 957.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.